Multi-pulse laser photography
AssigneeHughes Danbury Optical Systems, Inc.
InventorRichard A. Hutchin
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Abstract
An array of a large number of low quality light collectors measure light generated by arrays of coherent light illuminators and rebounded from a target. The resulting data is utilized to derive the resulting speckle pattern which in turn is Fourier transformed to reconstruct the target image.
Claims38
A method of producing an image of a target by reconstructing a target speckle pattern and using said target speckle pattern to produce image information about said target comprising the steps of:
- a. providing an array of light collectors having a given spacing there between;
- b. providing a first array having at least a pair of coherent light illuminators and a second array having at least a pair of coherent light illuminators, said second array being positioned transverse to said first array;
- c. illuminating said target by exciting all of said illuminators at least two at a time in said first and second arrays during a given period while causing at least one illuminator excited at any one time to be frequency shifted to provide an A.C. modulation on the resulting interference patterns;
- d. recording collector signals indicative of the varying intensity of light received at each of said light collectors from said target;
- and
- e. processing said collector signals to derive image information about said target.
A method of producing an image of a target by reconstructing a target speckle pattern and using said target speckle pattern to produce image information about said target comprising the steps of:
- a. providing a field of light collectors having a given spacing there between;
- b. providing a first linear array having at least a pair of coherent light illuminators and a second linear array having at least a pair of coherent light illuminators, said second array being positioned at an angle with respect to said first array, said angle selected from the group consisting of 60.degree. and 90.degree.;
- c. illuminating said target by exciting all of said illuminators, at least two at a time in said first and second arrays during a given period while causing at least one illuminator excited at any one time to be frequency shifted to provide an A.C. modulation on the resulting interference patterns;
- d. recording collector signals indicative of the varying intensity of light received at each of said light collectors from said target;
- and
- e. processing said collector signals to derive image information about said target.
Dependencies are inferred from the claim text.